package com.lx.huimailf.activity;


import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.widget.ImageView;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.lx.huimailf.R;


import java.util.Hashtable;

public class YaoqingmaActivity extends Activity {
    private int QR_WIDTH = 400, QR_HEIGHT = 400;
    private ImageView yaoqingma;
    private String custid;
    private String url;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_yaoqingma);
        SharedPreferences sp=getSharedPreferences("user", Context.MODE_PRIVATE);
        custid=sp.getString("custid","-11111");
        yaoqingma=(ImageView)findViewById(R.id.iv_yaoqingma);
        url="fx"+custid;
        createQRImage(url);
    }
    public void createQRImage(String url)
    {
        try
        {
            //判断URL合法性
            if (url == null || "".equals(url) || url.length() < 1)
            {
                return;
            }
            Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            //图像数据转换，使用了矩阵转换
            BitMatrix bitMatrix = new QRCodeWriter().encode(url, BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
            int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
            //下面这里按照二维码的算法，逐个生成二维码的图片，
            //两个for循环是图片横列扫描的结果
            for (int y = 0; y < QR_HEIGHT; y++)
            {
                for (int x = 0; x < QR_WIDTH; x++)
                {
                    if (bitMatrix.get(x, y))
                    {
                        pixels[y * QR_WIDTH + x] = 0xff000000;
                    }
                    else
                    {
                        pixels[y * QR_WIDTH + x] = 0xffffffff;
                    }
                }
            }
            //生成二维码图片的格式，使用ARGB_8888
            Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT, Bitmap.Config.ARGB_8888);
            bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
            //显示到一个ImageView上面
            yaoqingma.setImageBitmap(bitmap);
        }
        catch (WriterException e)
        {
            e.printStackTrace();
        }
    }
}
